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Title:
Ancient Invasions: From Endosymbionts to Organelles
Authors:
Dyall, Sabrina D.; Brown, Mark T.; Johnson, Patricia J.
Affiliation:
AA(Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095-1489, USA.), AB(Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095-1489, USA.), AC()
Publication:
Science, Volume 304, Issue 5668, pp. 253-257 (2004). (Sci Homepage)
Publication Date:
04/2004
Category:
CELL BIOL
Origin:
SCIENCE
Abstract Copyright:
(c) 2004: Science
DOI:
10.1126/science.1094884
Bibliographic Code:
2004Sci...304..253D

Abstract

The acquisitions of mitochondria and plastids were important events in the evolution of the eukaryotic cell, supplying it with compartmentalized bioenergetic and biosynthetic factories. Ancient invasions by eubacteria through symbiosis more than a billion years ago initiated these processes. Advances in geochemistry, molecular phylogeny, and cell biology have offered insight into complex molecular events that drove the evolution of endosymbionts into contemporary organelles. In losing their autonomy, endosymbionts lost the bulk of their genomes, necessitating the evolution of elaborate mechanisms for organelle biogenesis and metabolite exchange. In the process, symbionts acquired many host-derived properties, lost much of their eubacterial identity, and were transformed into extraordinarily diverse organelles that reveal complex histories that we are only beginning to decipher.
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